Trung, Nguyen, & Nguyen Viet Hung.
" MODELS FOR ENHANCING THE FOREIGN LANGUAGE PROFICIENCY OF OFFICIALS AND OFFICERS IN THE CUSTOMS, FOREIGN RELATIONS, TOURISM AND BORDER GUARDS SECTORS IN VIETNAM’S NORTHERN BORDER REGIONS: FROM PRACTICE TO KEY PRINCIPLES." <em>VNU Journal of Foreign Studies</em> [Online], 34.6 (2018): n. pag. Web. 18 Apr. 2024